Removing And Replacing The Front Panel Assembly - Keysight N5227A Service Manual

PNA Series Microwave Network Analyzers
N5227A

Removing and Replacing the Front Panel Assembly

Tools Required
• 9 mm socket or open end wrench torque wrench (torque to 21 in-lb or 2.38 N.m)
• T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
• T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)
• 5/16 inch open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
• ESD grounding wrist strap
Refer to Figure 6-2, "Front Panel Assembly, Front Side, All Options,"
Removal Procedure
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
3. With a 5/16 inch torque wrench, remove all the semirigid jumpers (not shown) from the front panel.
4. With a T-20 TORX driver, remove the screws (item ➁) from the sides of the frame.
CAUTION Before removing the front panel from the analyzer, lift and support the front of the analyzer
frame.
5. Slide the front panel over the test port connectors.
6. Disconnect the ribbon cable (item ➈) from the A1 front panel interface board.
Replacement Procedure
IMPORTANT When reconnecting the front-panel jumpers, torque the connectors to 10 in-lb.
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal
procedure. Refer to Table 7-2 on page
Service Guide N5227-90001
Removing and Replacing the Front Panel Assembly
"Removing the Covers" on page
7-54.
Repair and Replacement Procedures
for these procedures.
7-6.
7-7